Your question is a very broad one.
In general, it is a good coach. If it is priced in your range and it suits your needs, why not??
When it comes to particulars, do you have a specific coach in your sights?
When we looked, we drove these coaches on a Freightliner & Spartan chassis. Not a major difference from what I recall. Ended up buying ours on a Spartan with a Cat C7 350HP.
We picked up our 2005 2 years ago, this is our 4th RV.
We were very familiar with the coach side of things, but not so much on the chassis/motor side as this is our first DP. There are just a few more systems on the DP to become familiar with than what our previous Bounder had. This forum helped tremedously on the chassis motor side and still does today!
Unless you find a coach (any coach) from a seller that has kept meticulous maintenance records and everything is up-to-date, plan on spending some money for parts and labor (depending on your skill set). I hope you are a hands on type of guy, this will save you money in a big way down the road.
Our coach had out of date tires/batteries and the seller had limited receipts for work performed over the years (he was the original owner). We were able to use this info to negotiate the price down.
Good luck on your quest!
2005 Providence 39L, Spartan, CAT 350
2021 Jeep GC 80th